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Allan Hills 85155
Basic information Name: Allan Hills 85155
     This is an OFFICIAL meteorite name.
Abbreviation: ALH 85155
Observed fall: No
Year found: 1985
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 18.5 g
Antarctic Meteorite Newsletter:  AMN 10(2)  (1987)  L3
Meteoritical Bulletin:  MB 76  (1994)  L3.7
NHM Catalogue:  5th Edition  (2000)  L3.7
MetBase:  v. 7.1  (2006)  L3.7
Recommended:  L3.7    [explanation]

This is 1 of 51 approved meteorites classified as L3.7.   [show all]
Search for other: L chondrites, L chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)
Writeup from AMN 10(2):

Sample No.: ALH85155

Location: Allan Hills

Weight (g): 18.5

Field No.: 2665

Dimensions (cm): 2.5 x 2 x 2.5

Meteorite Type: L3 Chondrite


Macroscopic Description: Roberta Score

Ninety percent of this angular stone is covered with fusion crust. Medium-gray matrix with abundant inclusions make up the interior. Oxidation is minimal.


Thin Section (,3) Description: Brian Mason

Chondrules and chondrule fragments are abundant, ranging up to 1.5 mm across, and are set in a finely granular matrix. Small amounts of pale brown glass are present in the matrix and in some chondrules. Nickel-iron is present in minor amounts. Microprobe analyses show olivine ranging in composition from Fa8 to Fa28, with a mean of Fa21 (CV FeO is 30); pyroxene composition ranges from Fs4 to Fs20. The meteorite is an L3 chondrite (probably L3.6); it may be another member of the ALHA77011 pairing group.

Data from:
  Table 2
  Line 1383:
Origin or pseudonym:Far Western
Mass (g):18.5
Weathering grade:A/B
Fayalite (mol%):8-28
Ferrosilite (mol%):4-20
Comments:NTL=104±17; 77011 pairing group
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References: Published in Antarctic Meteorite Newsletter 10(2) (1987), JSC, Houston
Published in Meteoritical Bulletin, no. 76, Meteoritics 29, 100-143 (1994)
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     Catalogue of Meteorites:   (76° 43'S, 159° 40'E)
     Recommended::   (76° 50' 53"S, 156° 26' 13"E)
Note: the NHM and MetBase coordinates are 83.7 km apart

     This is 1 of 44248 approved meteorites from Antarctica (plus 3802 unapproved names)
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